Cassette sleeve



FIG. 1 is a perspective view of a cassette sleeve according to the present invention as seen from the top, front and left sides;

FIG. 2 is a top plan view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a front elevational view thereof;

FIG. 7 is a rear elevational view thereof;

FIG. 8 is an enlarged fragmentary perspective view of the front end of the cassette sleeve thereof showing folded tabs thereon; and,

FIG. 9 is a perspective view similar to FIG. 1 wherein the broken line representation is for environmental purposes only and does not constitute a part of the claimed design. 

We claim the ornamental design for cassette sleeve, as shown. 